Leather-staking machine.



'0. 638,250. Patented Dec. 5, I899.

r. CQKIM BALL. LEATHER STAKING MACHINE.

(Ap'plicatioz filed Apr. 26, 1899.) (No Model.) 3 Sheets-Sheet l 0 11;112:5555. IgX/egkm. g@%om 5 W 6. W

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No. 638,250. Patented Dec. 5, I899. F. C. KIMBALL.

LEATHER STAKING MACHINE.

(Application filed Apr. 26, 1899.)

3 Sheets-Sheet 2.

(No Model.)

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1J5 Im r I'I EEI 5 as. x zxw @I No. 638,250. 1 Patented Dec. 5, I899. r. c. KIMBALL.

LEATHER STAKlNG MACHINE.

(Application filed Apr. 26, 1899.)

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, HE rarns FRANK O. KIMBALL, OF SALEM, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO WILLIAM HOWARD HUTOHINSON, OF LYNN, MASSACHUSETTS.

LEATHER-STAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 638,250, dated December 5, 1899: Application filed April 26, 1899. Serial No. 714503. (No model.)

To all (Uh/07721 it may concern:

Be it known that I, FRANK O. KIMBALL, a citizen of the United States, residing at Salem, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Machines for Softening Hides or Skins, of which the following is a specification.

This invention relates to improvements in machines for softening hides or skins, generally termed staking-machines; and it embodies as elements an an tomatically-operated holder-bar for intermittently holding the hide or skin against a work-supporting table, a continuously-rotating frame provided with radially-movable scraper-holding bars and means for automatically moving such bars in a radial direction during the rotation of the frame in which they are guided, and an ant-omatically-operated oscillating rbilerholding frame provided with a roller, between which and the scrapers on the rotary frame the hide or skin is clamped during the softening operation, as will hereinafter be more fully shown and described, reference being had to the accompanying drawings, wherein Figure 1 represents an end view of the improved machine. elevation of-the same. Fig. 3 represents a cross-section on the line 3 3 in Fig. 2, showing the holder-bar released from the hide or skin preparatory to clamping the latter between the rotary scrapers and the roller on the oscillating roller-holding frame; and Fig. 4 represents a similar cross-section showing the hide or skin confined between the holderbar and work-supporting table during the softening operation.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

In the drawings, A A represent the end frames of the machine, which are secured at a proper distance apart by suitable stays or braces and a partial inclosing shell or case B, as shown.

C is a stationary work-supporting table secured to the front upper portion of the frames A A. In bearings in the said frames A A is journaled a rotary shaft B, to one end of which is preferaloly secured a gear E, the teeth of which mesh into the teeth of a pin- Fig. 2 represents a rear ion F, secured to the driving-shaft G, journaled in the frames A A and provided at one end, preferably, with a pulley H, to which a continuous rotary motion may be imparted by belt-power from any convenient source, as may be convenient and practical.

I is the up-and-down movable hide or skin holder bar, between which and the table 0 the hide or skin is intermittently clamped. Said holder-bar is automatically moved downward against the said table by means of cams K K, secured to the ends of the rotary shaft D and acting on levers L L, pivoted to the frames A A and connected in their free ends to rods M M, secured in their upper ends to the holder-bar I, as shown. The said holderbar I' is automatically moved upward when the cams K K cease to act on the levers L L preferably by the influence of springs N N, arranged on the rods M M and interposed between the under side of the ends of the holder-bar I and stationary perforated guides or projections O O, secured to the frames A A, as shown. It will thus be seen that the outer portion of the hide or skin P is automatically and intermittently held between the holder-bar I and the work-supporting table 0 during the operation of the machine.

On the shaft D is loosely journaled the oscillating roller-carrying frame, which is composed of a horizontal bar Q, to the ends of which are secured the levers or arms Q Q, which are pivoted on the shaft D and provided with slotted or forked lower extensions Q Q", to which are adj ustablyconnected, by means of pins or bolts q q, the eccentric-rods R R, attached to rings or straps R R, surrounding the eccentric disks R" R, secured to the rotary driving-shaft, as shown.

By the mechanism hereinabove described a rocking motion will be imparted to the roller-carrier during the continuous rotary motion of the drivin shaft. Eccentrics, as shown, are preferred; but other well-known mechanism maybe used for this purpose without departing from the essence of my invention.

To the under side of the roller-carrying bar Q is attached a pair of brackets or similar devices, in which is journa'led a roller S, as shown.

To the shaft D are secured two or more radial arms T T, having forked ends ti, in which are radially movable the horizontal scraperbars U U, provided with suitable scrapers or clamps U U, adapted to grasp and hold the hide or skin between them and the roller S while moving in the direction of the arrow, as shown in Fig. 4.

For the purpose of intermittently moving the scraper-bars U U and their scrapers U U during the contin uous rotation of said scraperbars U U toward the roller S, I prefer to make use of stationary cams V V, preferably secured to the frames A A, and for the purpose of causing the said scrapers to be automatically released from the roller S on the roller-holding bar Q, I prefer to make use of springs WV W, connected to the opposite scraper-bars UU, as shown. Each of the stationary cams V V is provided with a drop, as shown at t o, for the purpose of causing the clamps or scrapers 'U U to be automatically released from the hideor skin by the influence of the springs W W when the oscillating roller-carrying bar Q reaches the limit of its stroke toward the rear of the machine.

The operation of the machine is as follows: The skin or hide P is introduced between the table 0 and the holder-bar I when the latter is raised and between the clamping devices when the roller-carrying bar Q is being moved in the direction of the arrow shown in Fig. 3, and the radial arms T T on the continuouslyrotating frame are moved in an opposite direction, as shown in said Fig. 3, after which the skin or hide is caused to be automatically clampedbetween the scrapers U U on the rotaryscraper-bars U U and the roller S on the oscillating bar Q. Such clamping of the skin or hide is automatically accomplished by the scraper-bar U being forced outward by the stationary cams V V, by which the said scrapers are moved and held against the roller S on the oscillating bar Q. At or about the same time the outer portion of the skin or hide is automatically clamped and held frictionally by the holder-bar I against the worksupporting table 0 and the hide or skin resting thereon by the influence of the rotary cams K K. The skin or hide being thus clamped between the aforesaid roller S and scrapers U U" is drawn between such rollerandscrapers,whioh when clamped together are caused to travel for about a quarter of a revolution in the same direction as shown by arrow in Fig. 4. The skin or hide is held between the said roller and scrapers until the scraper-barU passes by the drops 2) v on the cams V V, causing said scraper-bar to be automatically drawn toward the reduced portion of the cams V V by the influence of the springs l/V WV, by which said scrapers are released from the skin or hide and roller S,after which the scraperframe continues to rotate in the same direction and the roller-carrier bar Q is automatically swung toward the work-support as before, and during such return motion of the roller-carrier bar the holder-bar I is automatically raised above the table 0, so as to enable the operator to shift, adjust, or reverse the position of the skin or hide, so as to cause various parts thereof to be clamped during the subsequent and continued operation of the machine.

It will be noticed by reference to Fig. 2 that I place the scrapers U'U 011 one scraper-bar U a little to the left of the middle of said bar and the corresponding scrapers on the opposite bar a little to the right of said middle portion. It will also be seen that I make the roller S about twice as long as the width of each set of scrapers, and by this arrangement the rotary scrapers are automatically caused to intermittently grip different portions of the hide or skin, thus facilitating the operation of the machine.

In the drawings I have shown the machine as provided with two radially-movable scraperholding bars, but more than two such bars may be used, if so desired.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure byLetters Patent and claim- 1. In a leather-staking machine, a continuously-rotating and radially-movable scrapercarrying bar, having a scraper or scrapers secured to it, in combination with an oscillating roller-carrying frame or bar, and automatic mechanism, substantially as described, for operatiu g said scraper and roller-carrying bars, substantially as and for the purpose set forth.

2. In a leather-staking machinea continuously-rotating scraper-frame and radiallymovable scraper-carrying bars guided therein, combined withan oscillating roller-carrying frame or bar, a stationary work-support, and an intermittently-movable holderbar, all combined and automatically opera ted, substantially as and for the purpose set forth.

3. In a leather-staking machine a continuously-rotating scraper-carrying frame and radiallymovable scrapers, guided on said scraper frame, combined with stationary cams for radially expanding said scrapers and springs for releasing the scrapers from an oscillating roller-carrying frame, substantially as and for the purpose set forth.

4. In a leather-staking machine a continuously-rotating scraper-carrying frame and radially-movable scrapers,guided on said frame, combined with stationary cams and springs, for intermittently moving said scrapers to and from a roller mounted on an oscillating frame, a stationary work-support, and an automatically-operated holder-bar, all arranged and combined, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANK C. KILWIBALIJ.

Witnesses:

ALBAN ANDRFN, ELLEN OoMIsKEY.

IIO 

